I'm a guy. On my end, what I am doing is to:

-Pay attention to my physical attractiveness (keep in shape, don't stop dressing up)

-Put effort into our sex life (I've been reading books on male sexual health, and improving sex in relationships)

-Not be too needy as it tends to kill attraction

As you can see, most of my relationships so far have been quite sex/attraction based, and never really moving past the honeymoon stage. I know very little about more mature relationships. "Mature" meaning things like making compromises between partners, dealing with rough patches etc.

Can someone recommend me books that cover the more "mature" part of relationships? Books that have concrete examples/applications are very helpful to me